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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: Bioanalysis. 2012 Jan;4(2):157–166. doi: 10.4155/bio.11.303

Table 4.

Relative matrix effect.

Low QC (conc.: 120 ng/ml) Med. QC (conc.: 1500 ng/ml) High QC (conc.: 17,000 ng/ml) %CV dif.
B–A 0 −0.1 0.4 <5
E–D 1 0.1 −0.4 <5
H–G 1.9 0 −0.2 <5
I–H 1.3 0.4 2.6 <5

n = 6.

IS: Internal standard; QC: Quality control.